did you get the bike fixed or did you find out the problem?

There is a gauge that shows exactly but you can do it without it just takes longer:

First eyeball the position of the float.
Set it close to where you think it should be, then screw the bolt back on and turn the gas on
If fuel runs out the overflow tube you will need to raise the needle up.
If fuel doesn't run out the overflow start the bike up and see if it runs. If it does run ride bike at wide open throttle and see if it cuts out if it cuts out and you can let off the throttle for a few seconds and it will then run again, that indicates it is starving the bowl and you need to lower the needle.

Hope this helps

Hey guys thanks for all your help. The dirt bike is running perfect now. I had the float upside down and that was the main problem. Thanks again for all your help........!!!!!

Awesome, glad to hear you got it running right again!

sweet good job I didn't figure it was something major